Book/Report

FZJ-2016-02798

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Stress Analysis for Coated Particles to High Fast Dose Values. Comparison between Calculations and Test Results

Bongartz, K. (Corresponding author)FZJ*

1971
Kernforschungsanlage Jülich, Verlag Jülich

Please use a persistent id in citations: http://hdl.handle.net/2128/11317

Report No.: Juel-0749-RW

Abstract: Stress calculations were performed for coated fuel particles which were irradiated up to a very high fast dose in the Dounreay fast reactor with practically no burnup. The results of the calculations were compared with the test results. As in this case burnup was negligible a more detailed investigation of the fast dose induced mechanismes only, contributing to the particle behaviour was possible. The dose induced unrestrained dimensional changes of the high density isotropic pyrocarbons (PyC-HDI) being very important input data for the model several sets of these curves given by various authors were used for the calculations. One particular set was found to give results in stress calculations which were in rather good agreement with the test results. The calculations fitted the test results as far as the various irradiation temperatures and densities of the material which were investigated are concerned. It appears probable that the very pronounced dependence of particle behaviour on the Bacon Anisotropy Factor (BAF) of the PyC-HDI can be taken account of in the stress model via the dose induced dimensional changes which appearto depend strongly on the BAF. The comparison between calculations and test result gave some evidence for mechanismes which probably led to failure of particles with a Siliconcarbide (SiC) interlayer in the test.

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Contributing Institute(s):

1. Publikationen vor 2000 (PRE-2000 ; Retrocat)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

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